The most popular alternative is Chartmetric, which is free. Unfortunately we only know of 1 alternatives to nextbigsound. If you can't find an alternative you can try to filter for web or SaaS options.
The list of alternatives was last updated Mar 29, 2020
Insights for music professionals with data from multiple music streaming services, social media platforms, and radio stations. Analyze and track cross-platform performance, similar artists/playlists/curators, audience demographics, charts, and more.